Being part of the Alter group, Raze had been told that there was a specific rule that was designated for those from Alterian. While in the world of Pagna, one wasn't supposed to use magic. The reason for that rule was because of portals.
Portals linked to other dimensions were attracted to the magic used, so as long as Raze used enough magic, then he could summon a portal and create a portal outbreak.
'If I summon a portal now, I have no clue what type of dimension will open up. Beasts might come out that are even too hard for me to handle,' Raze thought. 'On top of that, Alter will come and investigate. When they find out that I was here, no doubt I will be placed as number one on their list, and then the whole crap with the Red Brigade Clan will happen all over again.'